Hydraulics And Fluid Mechanics In Me - Study Mode

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[#596] According to Chezy's formula, the discharge through an open channel is (where A = Area of flow, C = Chezy's constant, m = Hydraulic mean depth and i = Uniform slope in bed)

(A) $${ ext{A}}sqrt {{ ext{m}} imes { ext{i}}} $$

(B) $${ ext{C}}sqrt {{ ext{m}} imes { ext{i}}} $$

(C) $${ ext{AC}}sqrt {{ ext{m}} imes { ext{i}}} $$

(D) $${ ext{mi}}sqrt {{ ext{A}} imes { ext{C}}} $$

Correct Answer

[#597] Principle of similitude forms the basis of

(A) Comparing two identical equipments

(B) Designing models so that the result can be converted to prototypes

(C) Comparing similarity between design and actual equipment

(D) Hydraulic designs

Correct Answer

(B) Designing models so that the result can be converted to prototypes

[#598] Which of the following statement is correct?

Correct Answer

(D) All of the above
(G) In an impulse turbine, the pressure of the flowing water remains unchanged and is equal to atmospheric pressure.
(L) All of the above

[#599] The length AB of a pipe ABC in which the liquid is flowing has diameter (d 1 ) and is suddenly enlarged to diameter (d 2 ) at B which is constant for the length BC. The loss of head due to sudden enlargement is

(A) $$frac{{{{left( {{{ ext{v}}_1} - {{ ext{v}}_2}} ight)}^2}}}{{ ext{g}}}$$

(B) $$frac{{{ ext{v}}_1^2 - { ext{v}}_2^2}}{{ ext{g}}}$$

(C) $$frac{{{{left( {{{ ext{v}}_1} - {{ ext{v}}_2}} ight)}^2}}}{{2{ ext{g}}}}$$

(D) $$frac{{{ ext{v}}_1^2 - { ext{v}}_2^2}}{{2{ ext{g}}}}$$

Correct Answer

[#600] In centrifugal pumps, maximum efficiency is obtained when the blades are

(A) Straight

(B) Bent forward

(C) Bent backward

(D) Radial